{"id":1065,"date":"2024-10-19T13:26:27","date_gmt":"2024-10-19T07:56:27","guid":{"rendered":"https:\/\/codexplained.in\/?p=1065"},"modified":"2025-11-24T15:39:01","modified_gmt":"2025-11-24T10:09:01","slug":"c-program-to-find-the-largest-of-three-numbers","status":"publish","type":"post","link":"https:\/\/codexplained.in\/?p=1065","title":{"rendered":"C Program to Find the Largest of Three Numbers"},"content":{"rendered":"
\n#include <stdio.h>\n\nint main() {\n    \/\/ Variable declaration\n    int num1, num2, num3;\n\n    \/\/ Prompt user for input\n    printf("Enter three numbers: ");\n    scanf("%d %d %d", &num1, &num2, &num3);\n\n    \/\/ Variable to hold the largest number\n    int largest;\n\n    \/\/ Determine the largest number\n    if (num1 >= num2 && num1 >= num3) {\n        largest = num1;  \/\/ num1 is the largest\n    } else if (num2 >= num1 && num2 >= num3) {\n        largest = num2;  \/\/ num2 is the largest\n    } else {\n        largest = num3;  \/\/ num3 is the largest\n    }\n\n    \/\/ Display the result\n    printf("The largest number is: %d\\n", largest);\n    return 0;\n}\n\n<\/pre><\/div>\n\n\n
Explanation<\/h2>\n\n\n\n
Include the Standard I\/O Library<\/strong>:<\/p>\n\n\n\n
    \n
  • #include <stdio.h><\/code>: This line includes the standard input-output library necessary for using printf<\/code> and scanf<\/code> functions.<\/li>\n<\/ul>\n\n\n\n
    Main Function<\/strong>:<\/p>\n\n\n\n
      \n
    • int main()<\/code>: This is the entry point of the program.<\/li>\n<\/ul>\n\n\n\n
      Variable Declaration<\/strong>:<\/p>\n\n\n\n
        \n
      • int num1, num2, num3;<\/code>: We declare three integer variables to hold the numbers that the user will input.<\/li>\n<\/ul>\n\n\n\n
        User Input<\/strong>:<\/p>\n\n\n\n
          \n
        • printf(\"Enter three numbers: \");<\/code>: This line prompts the user to enter three numbers.<\/li>\n\n\n\n
        • scanf(\"%d %d %d\", &num1, &num2, &num3);<\/code>: This reads the three integers from the user and stores them in num1<\/code>, num2<\/code>, and num3<\/code>.<\/li>\n<\/ul>\n\n\n\n
          Finding the Largest Number<\/strong>:<\/p>\n\n\n\n
            \n
          • We declare an integer variable largest<\/code> to store the largest number.<\/li>\n\n\n\n
          • The first if<\/code> statement checks if num1<\/code> is greater than or equal to both num2<\/code> and num3<\/code>. If true, num1<\/code> is assigned to largest<\/code>.<\/li>\n\n\n\n
          • The else if<\/code> checks if num2<\/code> is greater than or equal to both num1<\/code> and num3<\/code>. If true, num2<\/code> is assigned to largest<\/code>.<\/li>\n\n\n\n
          • If neither of the above conditions is true, num3<\/code> is assigned to largest<\/code>.<\/li>\n<\/ul>\n\n\n\n
            Display the Result<\/strong>:<\/p>\n\n\n\n
              \n
            • printf(\"The largest number is: %d\\n\", largest);<\/code>: This line prints out the largest number.<\/li>\n<\/ul>\n\n\n\n
              Return Statement<\/strong>:<\/p>\n\n\n\n
                \n
              • return 0;<\/code>: This indicates that the program executed successfully.<\/li>\n<\/ul>\n\n\n\n
                OUTPUT<\/h2>\n\n\n\n
                Enter three numbers: 10 20 30<\/p>\n\n\n\n
                The largest number is: 30<\/p>\n\n\n\n
                <\/p>\n